How to clear up distortion on capping from snes?

[yoda313]

I have a fusion hdtv 3 gold t capture card. On a whim I hooked up my snes to it to see if it would do realtime capturing without a delay. It did! And it seemed to be pretty smooth. However there were some pretty serious distortions in it. Kinda like static on antenna tv reception (ie the "blender effect"). I can play the game in realtime with no difficulty suprisingly but to do quality captures this would need to be cleared up.

I first ran the rca cables straight to the input adapter on the capture card. It had the distortion on it (and some horizontal lines that appear to be interlace artifacts). So I sent it through the aux input on my vcr and sent that to the capture card. Slightly better results but still noticeable.

Could also be frame rate problems?? I mean I thought all ntsc video devices outputed 30fps? I tried ulead videostudio 8 and was ok but still noticeable distortion. It seemed to still have the same problem in virtual vcr.

Later I'll post some screen grabs and a short divx clip to demonstrate the problem. Though I am amazed I can play it in realtime at all. There was an intolerable 1-2 second delay on my old wintv pvr250 when I tried my snes on that.

Any suggestions are welcome.

[vhelp]

I was interested in your post because I was curious if these distortions
you are mentioning are related or similar to mine, when I use my USDigital
HDTV receiver..

Well, you could start by telling us what is snes

Your mention of distortion is not clear enough for me to imagine.

When I Analog capture from my USDigital, HDTV receiver, I get some
distortion as well, but only when I'm connected via s-video. It seems
that the Composite does not suffer this.

Also, this distortion or phenomina (as I've been calling myself) is also
on anything that I use to bring/capture the s-video. Devices like my
VCR's; DV CAM's; Capture cards; Hardware MPEG cards; etc, all exhibit
this same problem via s-video. Anyways.

The distortions that *I* get are "diamong-shape" hatches/boxes, that
seem to look like a grid or something.

I appoligies for going on like this, but I was curious if *you* too,
were suffering the same thing. I was hoping for the naming (or revealing)
of the cause, and a possible remedy. But I feel that (in my isolated case)
that it might be on account of the cards' internal Scaling of this HD source,
and not any of the capture/recording devices I mentioned above, because all
these devices are exhibiting the same phenomina and are all tied to the HTDV rev'r.
And, if this is true (or close to the cause) then it might be similar to yours
as well. I was going to post a sample pic, but I think that your's should
be posted (not mine) so that we can relate your issue to your device, etc.

Regarding Analog capturing HDTV sources..

I think that they are as good as a .TS obtained source. Because the source
is not some kind of analog, noisey type source. It is digitally clean, if
you understand my perspective here. ( I'd be interested in posting a A/B
comparison some day - might turn up intersting )

..waiting on your sample(s) post

-vhelp 3849

[CheekyKid]

snes=super nintendo

[edDV]

@vhelp

Is your problem the same as this post?
https://forum.videohelp.com/viewtopic.php?t=296793


yoda313,
it would help if you posted a sample picture. That should be normal NTSC coming from a Nintendo.

[yoda313]

Hi all,

Ok here we go:



And here's a short 3.5mb 30 sec divx clip of it (I wanted to use a fairly high bitrate to preserve the example of the distortion - unfortunately the clip doesn't look that bad, but you can see the slight tearing of the video on the left and right edges, plus there are some static spotches in the middle of the picture - more visible on dark graphic spots that are large and don't move much - like a sky background or logo).

MARIO

Also I just did another test from a video tape off the same vcr that I'm running the snes through and no distortion. Here's a pic:



This is all connected through rca to the svideo adapter that came with the capture card. hdtv off antena is perfect and vhs video capture is normal. It's just the video game that has the distortion.

[vhelp]

@ edDV, ..umm, regarding that thread.. no. *Definately NOT* my issue
here on this end w/my usdigital hdtv receiver.

( I was gonna make a separate post on this issue elswhere's, but I was
hoping to do a little thread-jacking on someoneelse's if it came up the
same, so to save on the gas, if you know what I mean ) :P


@ yoda313, ..definately NOT the same problem I am experiencing.

But OAN, I've done this very same thing w/ my Nintendo (back a few
months ago, and I think I even posted on it) anyway, and my results
were the same as your's - very distorted. Mostly interlace garbage. But,
when this unit is displayed on a tv set, everything is nice and clean

I would guess that this is something to do with FPS and Gaming atributes
and things too techy for my interests.

Oops, almost forgot and left out..

I would say that thos pics are *normal* for the Nintendo unit, when setup
to capture from it.

-vhelp 3851

[edDV]

Yoda, the Nintendo outputs in interlaced NTSC and that is what you have. That is what interlace looks like on a computer monitor. You won't see the line tear on a TV.

You have the choice to drop a field. This will make a clean computer image at the cost of half vertical resolution and half motion resolution.

There is no significant motion in the lower frame. That is why you don't see line tear.

[yoda313]

If I cap this and then deinterlace the output before I author it will that clear it up?

I tried using dscaler but nothing changed while I was using the different modes.

[edDV]

If I cap this and then deinterlace the output before I author it will that clear it up?

I tried using dscaler but nothing changed while I was using the different modes.

If you don't like looking at interlace tear on the computer just drop a field. But it will seriously degrade your TV playout.

Every deinterlace technique has tradeoff.

People who want to maintain TV playback quality usually us a deinterlacing computer player like PowerDVD or WinDVD or VLC.

[yoda313]

Well I tried once with the interlaced mpg cap untouched and it was a little wavy on my standard tv.

I tried one deinterlace (even animation mode tmpgenc) and authored it. It was still wavy.

I guess if I really want to do this I'll just do the tried and true vhs recording then dubbing the tape. I know its double time capping but at least I know I can get good caps from the video tape.

Thanks again for the suggestions.

[edDV]

If your goal is still caps, try capping from PowerDVD.

If you want to improve what you have try a video deinterlacing filter intended for stills.

Here is a no frills pass through Photoshop's video deinterlacing filter.

[yoda313]

Thanks eddv but this was for movie sequences. I figure I'll just do the vcr and not worry about settings.